Medical researchers from the University of Naples, Italy, studied 85 men working at highway toll booths and found that their sperm number was no different from that of other young and middle-aged men in the same area, but their sperm motility decreased, so their fertility also decreased accordingly. In this study, staff at highway toll stations underwent comprehensive medical examinations, and 83% of men were married, with 7 out of 71 married individuals having no offspring after marriage.
If men are exposed to car exhaust for 6 hours every day, their testosterone levels will not change, but their sperm motility will decrease, thereby affecting fertilization ability. About one-third of female infertility is caused by abnormal sperm quantity and quality in the male partner. If the number of male sperm is less than 20 million sperm per milliliter of semen, the fertility is extremely poor. The sperm motility is weakened, and the abnormal morphology will also affect the male fertility.
Researchers believe that these men work in high concentrations of nitric oxide, sulfur monoxide, carbon monoxide, lead and other vehicle exhaust gases for a long time, and nitric oxide, lead, etc., are most likely to damage sperm quality. Researchers call for more in-depth research on this topic, and health workers should also pay attention to the negative effects of environmental pollution on human health, pay attention to people's health, and pay attention to human reproductive ability.